2016113https://jsb.ut.ac.ir/article_58229_373a87279c3e17f0f845490852308336.pdfdx.doi.org/10.22059/jsb.2016.58229The Effect of Long-Term Resistance Training on Growth Factors and Plasma Insulin in Two Severely Burned PatientsNasimbehzadnezhad. کارشناس‌ارشد فیزیولوژی ورزش، دانشکدۀ تربیت بدنی و علوم ورزشی دانشگاه اصفهان، اصفهان،authorSayyed MohammadMarandiدانشیار گروه فیزیولوژی ورزش، دانشکدة تربیت بدنی و علوم ورزشی، دانشگاه اصفهان، اصفهان، ایرانauthorFahimehEsfarjaniاستادیار گروه فیزیولوژی ورزش، دانشکدة تربیت بدنی و علوم ورزشی، دانشگاه اصفهان، اصفهان، ایرانauthorAhmadAbediاستادیار گروه روان شناسی کودکان با نیازهای خاص، دانشکدة روان شناسی و علوم تربیتی، دانشگاه اصفهان، اصفهان، ایرانauthortextarticle2016perThe aim of this study was to investigate the effect of 8 months of resistance training on GH, IGF1 and plasma insulin levels of patients with severe burns. The research method used was the case study with multiple base-lines for participants. The participants included two women with severe burns (age range of 20-30 years) in the “Accidents and Burns Hospital”. After determining the baseline, participants performed resistance training during 8 months of individual intervention and one month after this period, they were put under follow-up examinations for 2 consecutive months. The blood samples were collected under the fasting condition 24 hours after training at the end of each month. Based on the visual analysis, the resistance training in both participants caused changes (PND = 75% for the first participant in GH and 87.5% for the second participant, PND = 100% for both participants in IGF1 and PND = 62.5% for the first participant in insulin and 50% for the second participant). It seems that long-term resistance training can improve hormones and growth factor in patients with severe burns and consequently can expedite the treatment of the burns.Journal of Sport Biosciencesدانشکده تربیت بدنی دانشگاه تهران8

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20161533https://jsb.ut.ac.ir/article_58231_9a3533f6b5bc2f945aa9c5396ea3698b.pdfdx.doi.org/10.22059/jsb.2016.58231A Comparison of the Acute Effects of Voluntary Contractions at Different Intensities and Times on Explosive Power, Sprint and Agility in Football PlayersSadeghJafari Moghadamکارشناس ارشد فیزیولوژی ورزش دانشگاه آزاد اسلامی واحد علوم و تحقیقات کرمان، کرمان، ایرانauthorMohsenAminaiاستادیار دانشکدة تربیت بدنی و علوم ورزشی دانشگاه باهنر کرمان، کرمان، ایرانauthorHamidMarefatiاستادیار دانشکدة تربیت بدنی و علوم ورزشی دانشگاه باهنر کرمان، کرمان، ایرانauthortextarticle2016perThis study aimed at comparing the acute effects of voluntary contractions (PAP) at different intensities and times on explosive power, sprint ​​and agility in football players. 13 subjects (mean age 17.7±0.63 years, weight 57.9±6.9 kg and height 167.9±5.4 cm) were selected as available sample. During 7 sessions, the protocols of warm-up without load, half-squat %45, %65, %85 1RM after 4 minutes and half-squat %45, %65, %85 1RM after 15 minutes were randomly administered for the variables of explosive power, sprint and agility, and 35-m sprint running, Sargent vertical jump and Illinois agility tests were performed. Data were analyzed using analysis of variance with repeated measures (ANOVA). The results showed no significant differences in explosive power with different intensities after 4 minutes in the PAP acute effect with P≤0.05 but there was a significant difference in explosive power with 65% and 85% intensities after 15 minutes compared with warm-up protocol. There was a significant difference in the sprint in PAP after 4 minutes of 65% and after 15 minutes of 65% and 85% intensities compared with warm-up protocol. There was a significant difference in the agility in PAP after 4 minutes of 65% and 85% and after 15 minutes of 65% intensity among the intensities. Generally, time has a more effective role in improving power and sprint activities of athletes at moderate and peak intensity and agility with moderate intensity in post-activation potentiation (voluntary contractions) acute effect especially after 15 minutes. Journal of Sport Biosciencesدانشکده تربیت بدنی دانشگاه تهران8

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20163549https://jsb.ut.ac.ir/article_58233_7f0ebfc0200f115376fe7f410235b88f.pdfdx.doi.org/10.22059/jsb.2016.58233Validation of Allometric Equations of VO2peak with Anthropometric Intervention and Biological Maturation in 12-17-Year-Old Girls in Hamedan CityMaryamShahriariکارشناس ارشد فیزیولوژی ورزش دانشکدة تربیت بدنی و علوم ورزشی دانشگاه بوعلی سینا همدان، همدان،authorFarzadNazemدانشیار فیزیولوژی ورزش دانشکدة تربیت بدنی و علوم ورزشی دانشگاه بوعلی سینا همدان، همدان، ایرانauthorMohammad AliSamavati Sharifدانشیار فیزیولوژی ورزش دانشکدة تربیت بدنی و علوم ورزشی دانشگاه بوعلی سینا همدان، همدان،ایرانauthortextarticle2016perThe aim of this study was to investigate the effect of maturity level and body composition on the validity of allometric equations of VO2peak in obese and non-obese girls. 80 girls aged between 12 and 17 were randomly selected from schools in Hamedan city and divided into two groups: overweight-obese (BMI>85%) and normal (BMI<85%). Their biological age was determined by dental age method. VO2peak was assessed by Cureton test and allometric equations of Milano and Beunen. Pearson correlation and Bland–Altman methods were used to determine the validity. VO2peak was significantly different among three methods (P<0.01(. With the intervention of maturity, mean of VO2peak was not significantly different (P>0.05(. Validity of practical capacity in the obese adolescent girls with normal puberty was considerable (r =0.92, P<0.01). According to the SE values, Milano allometric equation had more accuracy to predict VO2peak in obese adolescent girls with normal maturation and non-obese subjects. Bland–Altman method showed a high agreement between the VO2peak of Cureton test and the allometric equation with a coefficient of 0.59. Validity of practical capacity in the obese subjects with abnormal maturation was significant (r=0.82, P<0.01); it was r =0.94, Pr =0.80, P2peak can be used to assess the level of cardiorespiratory fitness in adolescent girls.Journal of Sport Biosciencesدانشکده تربیت بدنی دانشگاه تهران8

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20165163https://jsb.ut.ac.ir/article_58234_dec07a70aca457f4a617f7332d4adf0e.pdfdx.doi.org/10.22059/jsb.2016.58234The Effect of 14 Week of Endurance Activity on miR-1 Expression of Left Ventricle in Male Wistar RatsMohammadFathiاستادیار فیزیولوژی ورزش گروه تربیت بدنی، دانشگاه لرستان، خر مآباد، ایرانauthorRezaGharakhanlouدانشیار، گروه تربیت بدنی، دانشکدة علوم انسانی دانشگاه تربیت مدرس، تهران، ایرانauthorHamidRajabiدانشیار، دانشکدة تربیت بدنی و علوم ورزشی،
دانشگاه خوارزمی، کرج، ایرانauthortextarticle2016permiR-1 is involved in many cellular processes including muscle hypertrophy (skeletal and cardiac). Endurance activities also cause cardiac hypertrophy. Therefore, the aim of this study was to investigate the effect of endurance activity on cardiac expression of miR-1. For this purpose, 14 rats were maintained under controlled conditions (temperature, light/dark (12:12) cycle, with ad libitum access to food and water) and randomly assigned to control and experimental groups after they were familiarized with the training protocol. The experimental group performed an (14 weeks) endurance training program on a treadmill; then, 48 hours after the end of the last session, they were anesthetized and sacrificed and their heart and left ventricle were removed. To determine the cardiac miR-1 expression, Real time-PCR method was used. The obtained data were evaluated using t test. Results showed no significant differences in the mean of cardiac miR-1 expression between the two groups (P =0.191). The endurance activity had no significant effects on cardiac miR-1 expression. It is likely that changes in miR-1, although low, appear in proteins level of target genes.Journal of Sport Biosciencesدانشکده تربیت بدنی دانشگاه تهران8

20167794https://jsb.ut.ac.ir/article_58240_10abd5859a77707f2bdc8b4b47cf244b.pdfdx.doi.org/10.22059/jsb.2016.58240The Effect of 10 Weeks of Endurance Training of Cycle Ergometer on Nesfatin-1 Levels and Insulin Resistance in Women with Type 2 DiabetesMehdiMogharnasiدانشیار فیزیولوژی ورزشی گروه تربیت بدنی و علوم ورزشی، دانشگاه سیستان و بلوچستان-ایرانauthorAsiyehTaji Tabasدانشجوی کارشناسی ارشد فیزیولوژی ورزش، دانشگاه سیستان و بلوچستان – ایرانauthortextarticle2016perThe aim of this study was to investigate the effect of 10 weeks of endurance training on nesfatin-1 levels and insulin resistance in women with type-2 diabetes. 16 women with type-2 diabetes were selected by purposive sampling method and randomly divided into experimental (n = 8) and control (n = 8) groups. The experimental group performed endurance training for 10 weeks, 3 sessions a week (with an intensity of 40-50% maximum heart rate for 20-25 minutes at the beginning of the training session, and with a gradual increase to 70-80% of maximum heart rate and 40-45 minutes in last sessions). The control group did not participate in training during the study. Blood samples were collected after 12 hours of fasting in pretest and posttest to evaluate the nesfatin-1, insulin and glucose levels. The obtained data were analyzed in SPSS 21 using Kolmogorov-Smirnov test and independent and dependent t tests with αP<0.05). But the nesfatin-1 and insulin levels did not significantly change in this group (P>0.05). Pretest and posttest changes only in glucose levels were significant in the experimental group compared with the control group (P<0.05). In conclusion, training on a cycle ergometer is a non-drug treatment to reduce blood glucose and insulin resistance in diabetic patients.Journal of Sport Biosciencesدانشکده تربیت بدنی دانشگاه تهران8

2016109122https://jsb.ut.ac.ir/article_58245_d3c7d1d2d405e8d484f695c02a5d117f.pdfdx.doi.org/10.22059/jsb.2016.58245A Comparison of the Effects of Three Types of Combined Training on Testosterone and Cortisol Concentration and Muscular Strength in Elderly WomenLalehBagheriدانشجوی دکتری فیزیولوژی ورزشی، گروه تربیت بدنی و علوم ورزشی، دانشکدة ادبیات و علوم انسانی،دانشگاه شهر کرد، شهرکرد،ایرانauthorMohammadFaramarziدانشیار، دکتری فیزیولوژی ورزشی، گروه تربیت بدنی و علوم ورزشی،
دانشکدة ادبیات و علوم انسانی، دانشگاه شهرکرد، شهرکرد، ایرانauthorEbrahimBanitalebiاستادیار، دکتری فیزیولوژی ورزشی،
گروه تربیت بدنی و علوم ورزشی، دانشکدة ادبیات و علوم انسانی، دانشگاه شهرکرد، شهرکرد، ایرانauthorZahraMardanpour Shahrekordiکارشناس یارشد فیزیولوژی ورزش، گروه تربیت بدنی و علوم ورزشی، دانشکدة ادبیات و علوم انسانی، دانشگاه شهرکرد، شهرکرد، ایرانauthortextarticle2016perThe aim of this study was to compare the effects of three types of combined training on testosterone and cortisol concentration, testosterone/cortisol ratio and muscular strength in elderly women. 40 elderly women (age range: 60.34±0.82 years) were randomly divided into four groups: endurance + strength (E+S) (n=9), strength + endurance training (S+E) (n=10), alternative concurrent training (ACT) (n=12) and control (n=9). The training program was performed for 8 weeks, 3 days per week. Endurance training protocol included performance on a cycle ergometer and strength training protocol involved several selected upper and lower body workouts. Paired samples t test and one-way ANOVA were used to analyze data. The results showed that 8 weeks of training did not change testosterone in S+E and ACT groups but a significant decrease was observed in testosterone in E+S group (P=0.007). In addition, results showed a significant difference in testosterone between E+S and ACT groups (P=0.01). In addition, no significant changes were observed in cortisol and testosterone/cortisol ratio after the training. Also, there was a significant increase in upper body strength only in E+S and ACT groups and in lower body strength in all groups. As there were no significant changes to basal hormones in 3 combined training groups, these subjects experienced no chronic catabolic state. Since strength increased in all groups, it seems that there was no relationship between hormonal status and the strength gains in the present study.Journal of Sport Biosciencesدانشکده تربیت بدنی دانشگاه تهران8

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2016123141https://jsb.ut.ac.ir/article_58247_a7010affead0234a1d70692d331cf370.pdfdx.doi.org/10.22059/jsb.2016.58247The Effect of Ischemic-Reperfusion Preconditioning and Remote Preconditioning on Production of Static and Dynamic Submaximal ForceAlirezaRamezaniاستادیار دانشگاه تربیت دبیر شهید رجایی، تهران، ایرانauthorSaraZare Karizakدانشجوی دکتری فیزیولوژی ورزشی دانشگاه
تربیت دبیر شهید رجایی، تهران، ایرانauthorMeysamShabaaniniaدانشجوی دکتری فیزیولوژی ورزشی دانشگاه تربیت دبیر شهید رجایی،
مربی دانشگاه آزاد اسلامی شوشتر، شوشتر، ایرانauthortextarticle2016perOptimization of training results and improvement of response requires selecting appropriate stimulus and are goals of any training program. It seems that ischemic-reperfusion preconditioning (IRPC) can be a suitable stimulus to increase submaximal contractile responses. Therefore, this study aimed at investigating the effect of ischemic-reperfusion preconditioning and remote preconditioning (IRRPC) on submaximal static and dynamic forces of young men. To this end, 20 young male students at Shahid Rajai University of Tehran were randomly selected and divided into two groups: control group (mean age of 20±1.42 years, height of 174.34±5.66 cm, weight of 71.1±6.12 kg) and experimental group (mean age of 20.5±1.33 years, height of 176.2±4.88 cm, weight of 74.45±7.09 kg). Participants performed single arm dumbbell preacher curl (weight of 8 kg) with most repetitions for dynamic movement and longest holding time of contraction at 90̊ for static movement. Pretest and posttest records were collected for both hands. In the experimental group, before the posttest, the dominant hand was under partial blood flow restriction (BFR) for 3 minutes and then the motion was carried out after one minute of reperfusion. To examine the differences between the two groups, one-way ANOVA was used. Normal data distribution was specified by Kolmogorov–Smirnov test and the level of statistical significance was P≤0.05. The results indicated that IRPC significantly increased static record (P=0.001, F=14.071) but IRRPC had no significant effects. This increase can be due to partial precompensation of temporary ischemia induced by static contractions. However, IRPC and IRRPC made no significant differences in dynamic contractile responses. Therefore, it is suggested that IRPC should be used to increase force and delay fatigue in submaximal static contractions.Journal of Sport Biosciencesدانشکده تربیت بدنی دانشگاه تهران8